/Engine/Source/Runtime/SlateCore/Public/Input/Events.h
FAnalogInputEvent ( const [FKey](API\Runtime\InputCore\FKey) InKey, const [FModifierKeysState](API\Runtime\ApplicationCore\GenericPlatform\FModifierKeysState) & InModifierKeys, const [FInputDeviceId](API\Runtime\Core\Misc\FInputDeviceId) InDeviceId, const bool bInIsRepeat, const uint32 InCharacterCode, const uint32 InKeyCode, const float InAnalogValue, const [TOptional](API\Runtime\Core\IO\TOptional)< int32 > InOptionalSlateUserIndex )